Heating device for air-circulating fans



Nov. 13, 192s. y 1,691,421

S. A. XIPPAS HEATING DEVICE FOR AIR CIRCULATING FANS Filed April 29,1927 Patented Nov. 13, 1928.-

uNrTEffST/ES PATENT-OFFICE.

socnnrnsnxlrras, kor BUFFALO', NEW YORK.

- 'HATINe DEvICE For. y'AIRCIRCULATING FANS.

i rApplicationriefiiiapru29,1927. seriaiNo. 187,421. f

l This invention ,relates `to improvements in tric heater which maybequicklyat-tached to) fior detached'from such a casing, although itwillbe obvious that theheater mightV be used `with other types ofVentilating fans and the" like. l n A f Anotherobject ofthe invention isto tui nish al heating attachment provided with resistance coils, andmeans for readily connect-y ing such coils to the wires of a fan motor,so

that the heater may be quickly attached and put in operation wheneverdesired. 4

Another object is to furnish an electric heater formed of hingedsectionsadapted to automatically interlock with a fan casing, when oneof the hinged sections is moved relatively to the other one of suchsections.

With the foregoing objects outlined and with other objects in view whichwill appear ias the description proceeds, the invention consists inthenovelfeatures hereinafter devscribedv'in detail, illustrated in theaccom-A panying drawings, and more particularly pointed out in theappended claims. Referring tothe drawing,

Fig. 1 isa top plan ,viewfofl the improved heater. y

Fig. 2 is an `enlargedside view of the same, andshowing the heaterattachedtothe fan casing.. c

Fig. 3 is an enlarged vertical sectional View of theheaten'andillustrating the manner in which it embraces the'fancasing. n

Fig. 4 is anenlargedsectional View taken on line4-4 of Fig. y n. Fig. 5is a side view partly in vertical section of the heater, in `foldedcondition.

In the drawing, 1 designates a spherical fan casing of the `type shownin my above .mentioned patent, such casing having air in- 1ct openings2, and air outlet .openingsr 3. Such casing is preferably made of upperand y'lower halves 4 and 5, connected together'at their/edges by abayonet joint (not shown), arranged Within a bead 6 which encircles thespherical casing at its horizontal medial por-` n tion.

It is the main purpose of the present in'- vention to provide anelectric heater which may be rea-dily and speedily attached to this tancasing, and adapted to heat the air as it is discharged,substantiallyhorizontally from the various outlet openings 3, around the fan casing.`The heater may be ot' any approprif ate construction, and orthe purposeofdisclosingfthe invention, I have illustrated a suitable embodiment ofthe heater.4 It includes a plurality of rings 7 ofinsulating Ina-,-

terial, spaced apart and connected by pins 8, l

and each ring is divided into a plurality of sections; the sectionsoftheupperring being hinged together at 9, and these hinges beingarranged at diametrically opposite sides of the ring, to permittheksections at one sideto be folded overon to the sections at the otherside, as'shown in Fig. 5.

Resistance coils 10 are arranged between the rings andare seated ingrooves 11 of the latter, these coils, when in use, surrounding the fancasing. The ends of the coils are electrically connected to sockets 12or the like, designed to receive pins 13 or the like, for connecting thecoils to the line wires.

In actual practice, the pins may be connected to the wires which leadthe current to the motor of the fan, but this forms no part of thepresent invention.

As best shown in Fig. 3, the upper and lower rings 7 have their innersurfaces converging toward the middle ring, so that these surfaces willconform to the spherical contour of the casing; the upper ring 7, insuch case, resting on the outer surface of the casing, and thussupporting the heater.

The middle ring may be narrower than the other rings, as shown in Fig.3, to accommodate the bead 6 on the casing, or, if de'- sired,-themiddle ring might have its inner surface grooved to receive said bead,the bead` in such case, also functioning to support the heater;

The opposite sides of the lower ring may,

if desired, be provided with spring catches 14; to automatically lockthe hinged sections in position, when the latter are movedintoalignment, that is, into the position shown in Fig. 2.

From the above,l it will .be clear that in attaching the heater tothefan casing, the heater may be placed on thecasing fromabove, and at thistime, the sections of the bottom ringl 7 will be separated slightly.

When the inner beveled surface of the upper.

Wires may be inserted in the .sockets 12, and

the coils 10 will be heated, and this heat will beiniparted to the airforced out through the openings 3.

'From the foregoing disclosure, it is obvious that the invention maypartake of many forms, so long as it is capable of being readilyattached to the casing, and of surrounding the latter, to permit the airdischarged radially from the fan casing'to be heated as it travels bythe heater. lVlien the heater is attached, the fan not'only circulatesthe air, but the air is heated during the circulation.

I am aware that various changes may be made in the details disclosedwithout de-y parting from the spirit of the invention yas expressed inthe claims.

What I claim and desire to secure by Letters Patent is:

1.A An electric heater including a plurality of a'mlularA insulatingrings, means connecting the rings together, resistance coils asso eiatedwith the rings, and extending entirely around the heater, one Vof saidrings having its inner surface beveled to permit the same to rest on n:iVeubetafnitially spherical surface for supporting the heater.

2. An annular electric heater comprising superposed rings of insulatingmaterial,

gether in spaced relation, and heating wires connected to the insulatingrings, and extending around said casing'.

4. A combination :as claimed in claim 3, in which the heater is formedof eec'ytions hingedly connected together.

In testimony whereof I allix m signature.

SOCRATES A. IIPPAS.

